Fresh Air

Science and technology now allow us to "hack" solutions to the biggest challenges of our time. But how far is too far? And what are the consequences of these hacks? We hear stories from TED speakers who dare to hack the brain, the climate, and even the animal kingdom in hopes of creating a better world. Computer security expert Mikko Hyppönen describes how he discovered the first PC virus, and what he learned about protecting the Internet today. Environmentalist Stewart Brand says we now have the technology to bring back some of the species that humanity has wiped out. Climate scientist David Keith proposes a cheap and surprising way to address climate change. Inventor Jay Silver encourages everyone to play with the world around them. Neurosurgeon Andres Lozano talks about dramatic findings in deep brain stimulation.